        :root {
            --huawei-blue: #003366;
            --huawei-light-blue: #0070c0;
            --huawei-gray: #f5f5f5;
            --huawei-dark-gray: #333333;
            --huawei-white: #ffffff;
        }

        body {
            font-family: 'HarmonyOS Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--huawei-gray);
            margin: 0;
            padding: 0;
            color: var(--huawei-dark-gray);
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .header {
            background-color: var(--huawei-blue);
            color: var(--huawei-white);
            padding: 30px 0;
            text-align: center;
            margin-bottom: 30px;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .header h1 {
            margin: 0;
            font-size: 2.5rem;
            font-weight: 500;
        }

        .header p {
            margin: 10px 0 0;
            font-size: 1.1rem;
            opacity: 0.9;
        }

        .two-column-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .card {
            background-color: var(--huawei-white);
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-left: 4px solid var(--huawei-light-blue);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
        }

        .card h2 {
            color: var(--huawei-blue);
            margin-top: 0;
            font-size: 1.5rem;
            font-weight: 500;
            border-bottom: 1px solid #eee;
            padding-bottom: 10px;
        }

        .card p {
            margin-bottom: 0;
        }

        .footer {
            text-align: center;
            margin-top: 50px;
            padding: 20px;
            color: var(--huawei-dark-gray);
            font-size: 0.9rem;
        }

        button {
            padding: 10px 20px;
            font-size: 1rem;
            color: #fff;
            background-color: #007bff;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        button:hover {
            background-color: #003366;
        }

        @media (max-width: 768px) {
            .two-column-layout {
                grid-template-columns: 1fr;
            }
        }